ISO INTERNATIONAL STANDARD 14446 First edition 1999-05-01 Binders for paints and varnishes - Determination of the viscosity of industrial cellulose nitrate solutions and classification of such solutions Liants pour peintures et vernis -Détermination de la viscosité dessolutionsdenitratedecelluloseindustriellesetclassification de ces solutions ISO Referencenumber ISO 14446:1999(E) No r y IHS under itted without license from IHS Not for Resale ISO 14446:1999(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (iSO committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. iSO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. International Standard ISO 14446 was prepared by Technical Committee ISO/TC 35, Paints and varnishes Subcommittee SC 10, Test methods for binders for paints and varnishes. Annex A forms a normative part of this International Standard. @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical,includingphotocopyingandmicrotilm,withoutpermissioninwritingfromthepublisher nternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland ational Organization for Standardizatior INTERNATIONAL STANDARD@ISO ISO 14446:1999(E) Binders for paints and varnishes Determination of the viscosity of industrial cellulose nitrate solutions and classification of such solutions 1 Scope This International Standard specifies a method of determining the viscosity of industrial cellulose nitrate, usually depending on the type. It alsogives a classificationsystemfor industrial cellulose nitrate solutions (see annexA)whichis basedon avoids classification differences which could be caused by the fact that there are many ways of determining viscosity and a wide variety of solvents available. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISo 760:1978, Determination of water - Karl Fischer method (General method). ISO 2811-1:1997, Paints and varnishes — Determination of density — Part 1: Pyknometer method Iso 2811-2:1997, Paints and varnishes — Determination of density — Part 2: Immersed body (plummet) method. Iso 2811-3:1997, Paints and varnishes — Determination of density — Part 3: Oscillation method. Iso 12058-1:1997, Plastics - Determination of viscosity using a falling-ball viscometer — Part 1: Inclined-tube method IsO 15528:—1), Paints and varnishes — Sampling 3 Principle The cellulose nitrate is dissolved in an acetone/water mixture at a concentration which will depend on the type of 1) To be published. (Revision of ISO 842:1984 and ISO 1512:1991) onal Organization for Standardization Not for Resale